Riding-type lawn mower



FIG. 1 is a left side view of a riding-type lawn mower showing my new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a perspective view thereof. 

The ornamental design for a riding-type lawn mower, as shown and described. 